Wecannottrusthimanymorebecauseheoften________hisduty.
A、owesPleasebeserious.Iamnot_______.Youshouldconsideritcarefully
The_______isnearlydead,soIcannotstartthecaragain.
Freemedicalserviceis_______tonearlyallthecollegestudentsinChina.
ThecollegestudentsinChinaare_______fromsmokingoncampusbecausethiswilldothemnogood.
Theengineersinthislabspentseveralweeks_______theirplansforthenewbicycle.
